JPH0560315A - Refuse feed port structure of refuse incinerator - Google Patents

Abstract

PURPOSE:To obtain a safe refuse feed port of a refuse incinerator, which is heat-resistant and through which smoke does not leak and moreover does not spout even when a cover plate is opened. CONSTITUTION:A refuse feed port 12 is opened and closed by a cover plate 2 and surrounded by an air duct 8 that communicates with a blower. The air duct 8 has an inward circumferential wall 13 that is inclined toward the center of a refuse incinerator, and the inward circumferential wall 13 has two or more air blow holes 14 through which combustion air is blown out toward the center of the incinerator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a refuse input port in a refuse incinerator.

[0002]

2. Description of the Related Art As a charging port in a refuse incinerator, there is a demand for a heating port that is safe from heat, a charging port that does not leak smoke, and a charging port that does not emit smoke when opened.

However, most of the conventional dust inlets are of a type in which the inner surface or the outer surface of the lid plate is heat-insulated and radiation, convection, and conduction heat from the high temperature gas in the furnace are cut off. But,
Radiation, convection, and conduction heat cannot be completely shut out by these methods. That is, due to the existence of a gap (play) in the charging port, heat leakage was unavoidable, and the heat conduction of the heat insulating material could not be reduced to zero. Therefore, with the passage of time, the leaked heat is accumulated on the cover plate, and the temperature becomes dangerous.

Regarding the leakage of smoke from the garbage inlet,
It is possible to eliminate the leakage even by the conventional method. However, since the inside of the furnace is pressurized by the blower, the structure that eliminates smoke leakage must be a completely sealed structure, and the gasket on the inlet flange surface and the tightening structure at the time of sealing become complicated. It will be difficult to open and close the slot.

Further, if the structure is such that the dust inlet can be opened and closed easily, there is a drawback in terms of tightening the door, and it is extremely difficult to eliminate smoke leakage. Even if a structure such as a gasket can prevent leakage, the service life is short, and if maintenance is not repeated constantly, a leak-free state cannot be maintained.

Next, regarding the point of smoke emission when the inlet is opened, in a conventional refuse incinerator, in a system in which air is blown by a blower to combust the inside of the furnace, the blower is always inside the furnace. It is pressurized with the discharge pressure of. Therefore, if the charging port is opened during combustion, there is a problem that the gas in the furnace flows backward from the charging port, which is dangerous.

[0007]

In view of the problems of the prior art, it is an object of the present invention to provide a safe dust inlet which is safe against heat, does not leak smoke, and does not blow out smoke when opened. ..

[0008]

[MEANS FOR SOLVING THE PROBLEMS] A dust inlet 12 which can be opened and closed by a cover plate 2 is surrounded, and a blower duct 8 communicating with a blower 5 is provided. The blower duct 8 is inclined toward the center of a refuse incinerator. It has a peripheral wall 13 or a guide plate 13a, and a plurality of air outlets 14 are formed in the inner peripheral wall 13.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an incinerator equipped with a refuse inlet according to the present invention. Reference numeral 1 denotes an outer wall of the incinerator, which is configured to put dust from the front surface (left side in the drawing) and discharge smoke from the rear part (right side in the drawing).

Reference numeral 2 denotes a lid plate of a dust input port, which is opened to throw dust into the inside. The smoke generated by burning in the furnace is purified in the air cleaning tank 3 and then discharged into the atmosphere from the chimney 4.

The air required for combustion is sent from the blower 5. The pressurized air generated by the blower 5 is sent to the dust inlet 12 (Fig. 2) side from the lower air supply ducts 6 provided on the lower sides of both sides of the furnace body, and is provided on the side of the dust inlet 12 at the front of the furnace body. Is sent to the air duct 8 surrounding the inlet through the air duct 7.
It is blown into the furnace from here.

The lid plate 2 of the charging port 12 has a peephole 9 at the center, and the internal combustion state can be observed from this. 10 is an ash outlet provided at the bottom of the inlet 12, 11 is an air supply duct 6
It is a lid plate for cleaning.

FIG. 2 shows the details of the dust input port. As shown in FIG. 2, the lower air supply duct 6 is provided in parallel with both sides of the lower part of the furnace body, and the front end is closed by the lid plate 11. An air supply duct 7 branches laterally from the lower air supply duct 6 and rises, and communicates with an annular air blow duct 8 that surrounds the dust inlet 12.

A large number of air outlets 14 are formed in the inner peripheral wall 13 of the annular blower duct 8 at a constant pitch. The inner peripheral wall 13 is inclined at a constant angle α so as to point toward the center of the furnace body as shown in FIG. A heat insulating material 15 is fixed to the inner surface of the cover plate 2 of the charging port 12.

Instead of inclining the inner peripheral wall 13 toward the inside of the furnace, an air guide plate 13a may be provided on the inner periphery of the blower duct 8 (FIG. 4 (b)).

(Operation) (1) The lid plate 2 of the dust inlet 12 is opened to the side to throw in dust, and when a predetermined amount has been thrown, this is closed. (2) The blower 5 sends combustion air for ignition. (3) Combustion air is sent to the annular blower duct 8 from the lower blower duct 6 through the rising duct 7 on the side of the charging port 12. (4) Air is blown toward the center of the furnace body from the air outlet 14 provided on the inclined inner peripheral wall 13 of the annular blower duct 8.

[0017]

[Effect] The blow-out is made toward the center of the furnace body from the blow-out port 14 provided in the inner peripheral wall 13 that is inclined by the angle α toward the center of the furnace body of the annular duct 8 provided around the dust inlet 12. As a result, even if the dust inlet 12 is opened, the smoke is blown out in the direction of the core at the angle α, so that there is no fear of being blown out to the outside.

Further, since the combustion air is blown from around the dust input port 12, the heat leaked to the vicinity of the dust input port is cooled, and the lid plate of the input port 12 is not heated to a dangerous temperature.

Further, since the combustion air is fed from the periphery of the dust input port 12, even if smoke is about to leak to the vicinity of the dust input port, the presence of the pressurized combustion air prevents the leakage.

[Brief description of drawings]

FIG. 1 is a perspective view of a refuse incinerator equipped with the present invention.

FIG. 2 is a detailed perspective view of the vicinity of a dust input port.

FIG. 3 is a detailed perspective view of only a dust input port.

FIG. 4 shows two structural examples in which air is directed to the inside of the furnace on the inner peripheral surface of the blower duct.

[Explanation of symbols]

 1 Outer wall of the incinerator 2 Lid plate (at the inlet) 3 Air cleaning tank 4 Chimney 5 Blower 6 Lower air duct 7 Air duct (on the side of the dust inlet) 8 (Around the inlet) Air duct 9 Peephole 10 Ash outlet 11 Cleaning lid plate 12 Garbage inlet 13 Inner wall 14 Air outlet 15 Insulation

Claims (2)

[Claims] 1. A dust inlet that can be opened and closed by a cover plate (2)
Surrounding (12), there is a blower duct (8) leading to a blower (5), the blower duct (8) having an inner peripheral wall (13) inclined toward the center of the refuse incinerator, A structure of a waste input port in a waste incinerator, which is characterized in that a plurality of air outlets (14) are provided in a peripheral wall (13). 2. The structure of a waste charging port in a refuse incinerator according to claim 1, wherein an air guide plate (13a) is provided on the inner peripheral wall instead of inclining the inner peripheral wall of the charging port.